Heavy element synthesis in the oldest stars and the early Universe
Article Abstract:
The first stars in the Universe were different from the new ones as they are composed entirely of hydrogen and helium, and lacked the heavier elements that determine the formation and evolution of younger stars. The chemical abundances in the oldest surviving stars provide clues about the types or identities of the very first generations of stars in the Galaxy and the Universe.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
The day the solar wind nearly died
Article Abstract:
Issues are presented concerning the factors which contributed to the fall in the density of the solar wind to almost zero on May 11, 1999. The insights which this phenomenon gave to scientists studying the Earths magnetosphere are discussed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
The age of the Universe
Article Abstract:
Issues are presented concerning the use of radioactive uranium as a dating mechanism to determine the age of the Universe. The revised estimated age of about 12.5-billion years is discussed.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Design and synthesis of an exceptionally stable and highly porous metal-organic framework. A homochiral metal-organic porous material for enantioselective separation and catalysis
- Abstracts: Sex differences in the functional organization of the brain for language
- Abstracts: Weak queen or social contract? Eusociality in Australian gall thrips. Facultative worker policing in a wasp
- Abstracts: Origin of the spider's head. The nitrogen fix
- Abstracts: Pathogen-driven forest diversity. Fungi and the food of the gods. Soil pathogens and spatial patterns of seedling mortality in a temperate tree